BELT TENSION
Automatic belt tensioner is used to provide proper tension on serpentine drive belt. For serpentine drive belt routing (Scheme 4)
Scheme 4
| Application | Specification | |
|---|---|---|
| Serpentine Belt | ||
| 1ZZ-FE & 2ZZ-GE | (1) | |
| (1) Automatic belt tensioner is used. Adjustment is not required. | ||
| (1) | Automatic belt tensioner is used. Adjustment is not required. |
BELT ADJUSTMENT TENSION
BRUSHES
- Brushes should slide smoothly in holders. Replace brushes if damaged or worn. See «GENERATOR SPECIFICATIONS»(ref-164007-S14033576052004072000000) .
- If exposed brush length is less than minimum, replace brushes and brush holder assembly. Install new brush springs when replacing brushes.
DIODES
- With diode/rectifier assembly removed and on bench, contact positive diode plate terminal with one ohmmeter probe. Using other ohmmeter probe, contact each diode lead in same plate. Note ohmmeter reading. Reverse ohmmeter probes, and repeat tests for all diodes.
- All diodes should show continuity in one direction and no continuity in opposite direction. If any diode is defective, replace diode/rectifier assembly.
ROTOR
- Check rotor for open field windings by using an ohmmeter across slip rings. Rotor resistance should be within specification. See «GENERATOR SPECIFICATIONS»(ref-164007-S14033576052004072000000) .
- Check rotor for shorts to ground by connecting ohmmeter between slip ring and rotor shaft. Ohmmeter should indicate no continuity. Check slip rings for wear or pitting. See «GENERATOR SPECIFICATIONS»(ref-164007-S14033576052004072000000) . If slip rings are rough or scored, replace rotor.
STATOR
Connect ohmmeter between 2 stator leads. Continuity should exist between all stator leads. Connect ohmmeter between each stator lead and metal core. Continuity should not exist. If stator does not test as indicated, replace stator.
VOLTAGE REGULATOR
Note. When positive and negative probes between terminals are exchanged, there is continuity in one direction but not in the other direction.
Using ohmmeter, check for continuity between following
- Terminals "F" and "B"
- Terminals "F" and "E"
If continuity is not as specified, replace voltage regulator. See
Scheme 5
2003
For 2003 models, go to STARTING/CHARGING in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
2004
For 2004 models, go to STARTING/CHARGING in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.